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Influence of oxidizer injection angle on the entrained flow gasification of torrefied wood powder
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science. RISE-Energy Technology Center AB, Piteå, Sweden.ORCID iD: 0000-0002-6473-7090
RISE-Energy Technology Center AB, Piteå, Sweden.
RISE-Energy Technology Center AB, Piteå, Sweden.
RISE-Energy Technology Center AB, Piteå, Sweden.
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2018 (English)In: Fuel processing technology, ISSN 0378-3820, E-ISSN 1873-7188, Vol. 181, p. 8-17Article in journal (Refereed) Published
Abstract [en]

In the present work, 5 different axisymmetric burners with different directions of the oxidizer inlets were experimentally tested during oxygen blown gasification of torrefied wood powder. The burners were evaluated under two different O2/fuel ratios at a thermal power of 135 kWth, based on the heating value of torrefied wood powder. The evaluation was based on both conventional methods such as gas chromatography measurements and thermocouples and in-situ measurements using Tunable Diode Laser Absorption Spectroscopy. It was shown that changes in the near burner region influence the process efficiency significantly. Changing the injection angle of the oxidizer stream to form a converging oxidizer jet increased process efficiency by 20%. Besides increased process efficiency, it was shown that improvements in burner design also influence carbon conversion and hydrocarbon production. The burner with the best performance also produced less CH4 and achieved the highest carbon conversion. The effect of generating swirl via rotating the oxidizer jet axes was also investigated. Swirl broadened or removed the impingement area between the fuel and oxidizer jets, however resulting in differences in performance within the measurement uncertainty. 

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 181, p. 8-17
Keywords [en]
Entrained flow gasification, Process optimization, Burner design, TDLAS, Syngas, Biomass
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-71020DOI: 10.1016/j.fuproc.2018.09.005ISI: 000449900500002Scopus ID: 2-s2.0-85053436599OAI: oai:DiVA.org:ltu-71020DiVA, id: diva2:1251834
Note

Validerad;2018;Nivå 2;2018-09-28 (svasva)

Available from: 2018-09-28 Created: 2018-09-28 Last updated: 2019-04-03Bibliographically approved
In thesis
1. Improving the efficiency of entrained flow gasifiers by real time in-situ diagnostics and burner design
Open this publication in new window or tab >>Improving the efficiency of entrained flow gasifiers by real time in-situ diagnostics and burner design
2019 (English)Doctoral thesis, comprehensive summary (Other academic)
Alternative title[sv]
Optimering av suspensionsförgasare med hjälp av laserdiagnostik och brännardesign
Place, publisher, year, edition, pages
Luleå: Luleå University of Technology, 2019. p. 110
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
urn:nbn:se:ltu:diva-73406 (URN)978-91-7790-348-2 (ISBN)978-91-7790-349-9 (ISBN)
Public defence
2019-06-14, E231, Luleå, 10:00 (English)
Opponent
Supervisors
Available from: 2019-04-04 Created: 2019-04-03 Last updated: 2019-05-17Bibliographically approved

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Ögren, YngveWiinikka, Henrik

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